Author Topic: Tire pressures for "Classic" spec tires  (Read 923 times)

Offline Butch (cb)

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Re: Tire pressures for "Classic" spec tires
« Reply #30 on: 26.01. 2021 08:29 »

https://www.ebay.co.uk/itm/90-Degree-Angle-Tyre-Valve-Extension-Adaptor-Motorcycle-Motorbike-Car-Bike/113766791704?hash=item1a7d077a18:g:ihMAAOSwUn9aAX5d

I have got four of those extensions, they are no good, they all leak giving you a slow puncture, unless you remove them after inflating the tire but you will have to over inflate to compensate for the air loss while removing it.

Yeah, I don't leave them on, and I guess they'd mess with wheel balance if you're sensitive to such things. I figure I don't lose any more pressure taking them off than when I remove a pump nozzle.
Warning - observations made by this member have a 93% unreliability rating.

Of Bikes; various, including ...
'58 Iron Head Flash Bitza


Offline Jules

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Re: Tire pressures for "Classic" spec tires
« Reply #31 on: 26.01. 2021 09:36 »
I still use the good old standard tube in tube, sliding out gismo, have done for years without fault....I guess the issue is which device is correct when checking one to another, so I use the pump gauge initially to get the air in, then my trusty gauge to set them, for consistency  at least.....

Offline Greybeard

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Re: Tire pressures for "Classic" spec tires
« Reply #32 on: 26.01. 2021 09:52 »
My dad had one of those tube-in-tube pocket pressure guages. Are they accurate?

Online RoyC

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Re: Tire pressures for "Classic" spec tires
« Reply #33 on: 26.01. 2021 11:14 »
My dad had one of those tube-in-tube pocket pressure guages. Are they accurate?

I've got a couple of those, had them for years.
I haven't got a clue where they came from.
My bike is a 1958 A7SS
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Online Triton Thrasher

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Re: Tire pressures for "Classic" spec tires
« Reply #34 on: 26.01. 2021 11:30 »
My dad had one of those tube-in-tube pocket pressure guages. Are they accurate?


You can call me “Two-Schraders!”

They are typically accurate enough.  Tests done by a motor magazine in the 1970s showed the old type to be more accurate than small dial-type gauges and much more accurate than many garage forecourt ones.

Stick to one gauge of your own and you’ll get consistent results, even with the inaccuracies.

Offline muskrat

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Re: Tire pressures for "Classic" spec tires
« Reply #35 on: 26.01. 2021 18:50 »
Stick to one gauge of your own and you’ll get consistent results, even with the inaccuracies.
I agree 100%. Pump the tyres up with the inflator to a few Lbs over then adjust with your gauge. Using the same gauge all the time and you know where you stand. I prefer the digital ones for accuracy.
Cheers
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Offline BSA_54A10

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Re: Tire pressures for "Classic" spec tires
« Reply #36 on: 27.01. 2021 09:50 »
My dad had one of those tube-in-tube pocket pressure guages. Are they accurate?

Does not matter.
All that is important is if 9 on the gauge is right for you then you inflate them above that then bleed down to 9 .

I have a dozen different tyre gauges and it would be very rare for them all to read the same
Rule of thumb, to smaller the full scale range the more accurate the reading should be
Thus I have two 0-20 psi gauges for mowers
Three 0-40 psi gauges for cars & motorcycles
two 0-60 psi for trucks
Bike Beesa
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Offline Greybeard

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Re: Tire pressures for "Classic" spec tires
« Reply #37 on: 27.01. 2021 10:15 »
I'd like to get a good quality inflator for my compressor. Can you recommend one for me?


I have one like the ones that they use on garage forecourts and the reading is bang on.

It's no good for the BSA though, can't get it on the tire valve.
I use a foot bump and a tire gauge for them.

You didn't explain so I'm asking again:
Why can't the dooberry fit on the wossname? Is it the brake drum that's the problem? What about putting a bend in the metal tube; would that help?

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Re: Tire pressures for "Classic" spec tires
« Reply #38 on: 27.01. 2021 10:45 »
I'd like to get a good quality inflator for my compressor. Can you recommend one for me?


I have one like the ones that they use on garage forecourts and the reading is bang on.

It's no good for the BSA though, can't get it on the tire valve.
I use a foot bump and a tire gauge for them.

You didn't explain so I'm asking again:
Why can't the dooberry fit on the wossname? Is it the brake drum that's the problem? What about putting a bend in the metal tube; would that help?


Sorry GB.
On my inflator I have to pull a fitting back to lock it onto the valve.
From memory, there isn't enough room to get my fingers between the spokes to do this.
No problem on the car.
It only takes a couple of dozen pumps with the foot pump so no problem.
My bike is a 1958 A7SS
Staffordshire UK

Offline Greybeard

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Re: Tire pressures for "Classic" spec tires
« Reply #39 on: 27.01. 2021 12:53 »
Why can't the dooberry fit on the wossname? Is it the brake drum that's the problem? What about putting a bend in the metal tube; would that help?

Quote

On my inflator I have to pull a fitting back to lock it onto the valve.
From memory, there isn't enough room to get my fingers between the spokes to do this.
No problem on the car.
It only takes a couple of dozen pumps with the foot pump so no problem.
Ah, I understand. Cheers m'dear.

Online Rex

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Re: Tire pressures for "Classic" spec tires
« Reply #40 on: 27.01. 2021 13:10 »
I ordered a small connector of the type mentioned above, ie a small lever is pulled back which then locks it onto the valve stem. It came from China (surprise surprise) but it's actually a surprisingly well-made item.
Doesn't have an in-built gauge so I check it with an ancient Duco sliding gauge which came from my dad's workshop decades ago, which reads pretty much the same as both the footpump gauge and the workshop compressor trigger inflator.

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Re: Tire pressures for "Classic" spec tires
« Reply #41 on: 27.01. 2021 14:05 »
Why can't the dooberry fit on the wossname? Is it the brake drum that's the problem? What about putting a bend in the metal tube; would that help?

Quote

On my inflator I have to pull a fitting back to lock it onto the valve.
From memory, there isn't enough room to get my fingers between the spokes to do this.
No problem on the car.
It only takes a couple of dozen pumps with the foot pump so no problem.
Ah, I understand. Cheers m'dear.

Just been down the garage to have a look why I couldn't use it on the bike.

A.  It's not offset.
B.  Awkward to operate the locking trigger.

My bike is a 1958 A7SS
Staffordshire UK

Offline Greybeard

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Re: Tire pressures for "Classic" spec tires
« Reply #42 on: 27.01. 2021 17:28 »
Maybe one of those guages but with a rigid tube would be OK.

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Re: Tire pressures for "Classic" spec tires
« Reply #43 on: 27.01. 2021 17:46 »
Maybe one of those guages but with a rigid tube would be OK.


I think it would.
My bike is a 1958 A7SS
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Offline Jules

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Re: Tire pressures for "Classic" spec tires
« Reply #44 on: 28.01. 2021 00:03 »
I use the rigid tube "push on" type inflator on my compressor for pumping up everything from cars to mulchers ( their tyres that is!), the only problem can be if the tyre is completely flat, in which case it pushes the valve through the wheel into the air cavity (its ok for tubeless of course), so then you need to grab the valve stem with locking pincer pliers while you pump the air in to get it started.....then I'm happy to use my old faithful sliding pressure gauge, again consistency is the key IMO.
A good example is my (very old!) yard tractor, I pumped the tyres up to around 30 psi using the gauge on the pump (30 psi recommended max) then went in for lunch and left it in the sun...........BANG! a front tyre blew out, when I checked the rest with my trusty old gauge, closer to 40 psi (admittedly with the hot air too!), lesson learned and $60 later  *respect*